Firstly, the album has been distributed to iTunes users via iCloud - which means it'll show up in your library but unless you've got auto-downloads turned on, it won't actually be stored locally on your computer or iPhone.

If when you navigate to the album you see little cloud icons with download arrows by every song, then you haven't downloaded it. If those icons aren't there, swipe left on each song and click the big red delete button.

Now, however, you need to hide the album from iTunes (yes, even if you've just deleted it). To do this you need to open up iTunes on a computer, log into your account, find the album, hover over the cover and then click the X in the top left.

If it keeps on re-appearing then you need to turn off auto-downloads. You can do this from your computer or from your iPhone - just navigate to settings, scroll down to iTunes & App Store, then turn off automatic downloads. There: all done.

And for non-Apple users who also want to delete some U2? Well, you'll have to wait until Songs of Innocence goes on general release on October 13, buy the thing, then delete it, just so you don't feel left out.